Speaker cabinet



FIG. 1 is a front elevational view of a speaker cabinet showing my new design;

FIG. 2 is a right side elevational view;

FIG. 3 is a rear elevational view;

FIG. 4 is a left side elevational view; and

FIG. 5 is a view like FIG. 3 of the cabinet with the front in a vertical plane. 

The ornamental design for a speaker cabinet, as shown and described. 